{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["RNA", "cell type", "protein", "cell line", "DNA"], "input": "Perhaps murine thymocytes are denied this form of rescue because they shut off IL-2R beta chain expression at an earlier stage or because they may be uncommonly Bcl-2 deficient (cf. Sentman et al., 1991; Strasser et al., 1991)."}
{"RNA": [], "cell type": ["murine thymocytes"], "protein": ["IL-2R beta chain", "Bcl-2"], "cell line": [], "DNA": []}